Adding-machine.



F. J. PETERSON.

ADDING MACHINE. APPLIATloN FILED Aue.22. |911.

Patented Sept. 24, 1918.

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F.v J. PETERSON'.

ADDING MACHINE.

APPLICATION FILED AuG.22, 1911.

Panteasept. 24,1918.

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EREDOLF J. PETERSON, or ALLIANCE, OHIO.

ADDING-MACHINE.

Specification of Letters Patent.

PatentedSept. 24, 1918.

Application led August 22, 1917. -4 Serial No. 187,589.

To all 'whom t may concern:

Be it known that I, F REDOLF J. PETERSON, a citizen of the United States, residing at Alliance, in the county oi' Stark and State of Ohio, have invented a new and useful Adding-Machine, of which the following is a specification.

My invention relates to adding machines `and has for its objects the provision of a new and improved adding machine which is comparatively simple and durable in construction, not liable to easily get out of order, compact in form and arranged to permit convenient manipulating with a view of adding any desired number of sums and indicating the total and is more especially adapted for adding sums representing sums` in dollars and cents or other denominations. A further object is the provision of a machine of the character referred to with a clearing device arranged to clear the machine after each total is made.

With these objects in view the invention consists in the novel construction and arrangement of arts,yhereinafter described, illustrated in t e accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size and minor details of construction may be made within the yscope of the appended claims,

without departing from the s y irit or sacrific-y ing any of the advantages o the invention.

In the accompanying drawings:

Figure 1 is a plan view constructed in accordance with my invention.

Fig. 2 is a sectional view on Fig. 1. e

Fig. 3 is an enlarged sectional view on the line 8-3, Fig. 1.

Fig. 4 is a plan view of the interior of the adding machine,y parts being broken away for the purpose of illustration.

Similar numerals of reference indicate corresponding parts throughout the several figures of the drawings.

Referring more especially to the construction illustrated in the accompanying drawings, the numeral lvrepresents the bottom the line 2-2,

wall of the adding machine which is subv stantially of the form shown and is provided with the removable cover 2 having down- .wardly depending ianges 3 around its edges which are arranged to be added to said bottom plateby means of screws f1 or their equivalents.

The machine illustrated is designed to add seven columns and is `provided with the seven spaced, vertically disposed, non-rotatable posts 5 which are preferably made in the form of screws as shown and are ar-L ranged to be inserted into the screw threaded apertures 6 formed in the bottom wall 1. Located around and eccentric toeach post 5 and attached tothe bottom plate 1 by any suitable means such as spot welding or the like is a circular track 7 the purpose of which will be hereinafter described. Loosely mounted upon each post 5 and arranged to rotate in a horizontal plane slightly, above the adjacent track 7 is a 'gear wheel 8 ,pro-k vided with a hub 9 having a reduced portion 10. Slidably mounted upon each of these gear wheels isa pawlll provided with a bifurcated portion 12 arranged to receive the hub 9 and havingr a downwardly` disposed pin 13 which is slidably mounted within the slot 14 formed in the gear wheel and pro-y vided with an enlarged head 15 located'within the eccentric track 7*. A ratchet wheel 16 y is fixedly mounted upon the reduced portion 10, of each hub by means of a key 17 and arranged to be engaged by means of they adjaymeans of the key 17, said number wheels being located'just beneath the cover 2 and provided upon their upper faces with the numbers from 0 t0 9 arranged to appear singly through the aperture 25 formed in the cover plate. A circular aperture 26 of less diameter than the number wheel and located con centric thereto is provided in the cover plate above leach number wheel and extending through saidapertureare the posts 27, which arecarried by the number ywheel and upon which is mounted theperforated ring 28 which is provided adjacent each number upon the number wheel with a circular aperture 29. One of the posts 27 upon each number wheel is provided with a downwardly disposed projection 30 and an upturned and inwardly disposed stop member 31 is formed in each circular aperture 26 of the cover plate at a point adjacent the aperture 25.

Located in the saine longitudinal line as the posts 5 and spaced between each adjacent pair of said posts is a post 32, each of said posts have rotatably mounted thereon a pinion 33 meshing with the adjacent gear la to the left thereof and a ratchet wheel 34 welded or otherwise fiXedly secured to said pinion.` Each of these ratchet wheels is adapted to be engaged by the pawl 11 carried upon the gear wheel to the right. It will be seen from an inspection of the drawings that the radial movement of this pawl is controlled by the eccentric track 7 and that with each complete revolution of the gear 8 the pawl 11 will be moved into engagement with the adjacent ratchet wheel 34, moving said ratceht wheel forward and causing the adjacent pinion 33 to rotate the gear Swith which it is in mesh one-tenth of a complete revolution. As each gear 8 is rotated to a position bringing the pawl 11 adjacent the ratchet wheel 311 upon the right of said gear, said pawl by means of the eccentric ytrack 7 will be drawn toward the post 5 a sufficient distance to prevent its engaging said last ratchet wheel.

The operation of the device is as follows: Assuming that the first item to be added was $2.7 5 a pencil or other suitable instrument would be inserted in the aperture 29 opposite the number 2 upon the cover o`f the third ring from the right and theringwould be moved toward the left until the pencil or other instrument used would contact with the stop member 31. The operation would then be repeated upon the second ring from the right, thepencil being placed in the aperture opposite the 7 upon the cover and moved in the same manner until it engaged the stop 31 and then the operation would be repeated upon the right hand end ring, the pencil being placed in the aperture opposite the number 5 upon the cover and moved to the left in the manner above described. dicated through the apertures 25 in the three units at the right of the machine. Other items would be placed in the machine -in the same manner as above described. 1t will be seen that with each complete revolution of each number wheel the pawl 11 carried upon that particular unit will engage the ratchet wheel 34 to the left and through its pinion 33 will move the iieXt adjacent number wheel to the left one-tenth of a revolution. The locking pawls 18 will prevent any back movement of the number wheels and The item $2.75 Vwould thus be ini the sum after the addition of each item will be indicated through the apertures 25 in the cover plate. Vhen a total has been obtained and it is desired to add a new account it is of course necessary to first clear the machine and this is accomplished by the clearing device-which is illustrated in the drawings.

This clearing device comprises a pair of slidably mounted rods or bars 35 and 36 which bars are provided with posts 37 eX- tending through the angular slots 38 formed in the cover 2 suitable collars 39 being pro vided upon said posts for properly spacing the bars 35 and 36 from the cover. Springs Ll() are provided upon the bars 35 and 36 and attached to the cover for the purpose of normally holding the clearing device in the initial position as best shown in Fig. 4 of the drawings. Each 0f the posts 37 is provided upon its upper extremity with a knob L i1 by means of which the bars are operated. The bar 35 is provided with the inwardly disposed arms i3 having iii-turned ends 44 which extend slightly beyond the longitudi-` nal center of the machine when in the initial position while the bar 36 is provided with similar arms 35 which terminate slightly short of the longitudinal center of the ma-r chine when the'bar is in the initial position. lVhen it is desired to clear the machine the bars 35 and 36 are moved to the left and right respectively by means of the knobs 41, said bars moving in a direction governed by the shape of the slots 38 the in-turned extremities of said bars contacting with the pins 30 of any of the number wheels which are not in the zero position. It is of course under stood that the pin 30 upon each number wheel is located adjacent the 0. upon each number wheel. For instance suppose that the pin 30 upon one of the number wheels was located adjacent the number9 upon the cover. When the bar 36 is moved to the right the adjacent Afinger 45 would contact with said pin and rotate the number wheel to a position bringing said pin adjacent the number 5 upon the cover. As the bar 35 is then moved to the left the adjacent finger 43 will engage the pin and rotate the number wheel to Zero position.

1 claim:

1. 1n an adding machine of the character described,v the combination of a casing, a plurality of spaced posts carried by the bottom wall of said casing, a number wheel loosely mounted upon each post, a gear wheel lixedly attached to each number wheel, a pawl carried by each gear wheel, a ratchet wheel arranged to be engaged by each pawl7 a pinion Xedly connected to each ratchet wheel and meshing with the next adjacent `gear wheel, the top wall of said casing being provided with apertures concentric with kand of less diameter than said number wheels, and perforated annular members through said apertures.

2. In an adding machine of the character described, the combination of a casing, a plurality of spaced posts carried by the bottom Wall of said casing, a number Wheel loosely mounted upon each post, a gear Wheel ixedlyy attached to each number Wheel, a pavvl carried by each gear Wheel, a ratchet Wheel arranged to be engaged by each paWl, a pinion ixedly connected to each ratchet Wheel and meshing With the ynext adjacent gear Wheel, the top Wall of said casing being provided With apertures concentric With andor` less diameter than said number Wheels, perforated annular members carried by the number Wheels and extending through said apertures, and a stop member formed in each of said apertures.

3. In an adding machine of the character described, the combination of a casing a plurality oi spaced posts carried by the bottom Wall of said casing, a number Wheel loosely mounted upon each post, a gear Wheel fixedly attached to each number Wheel, a paWl carried by each gear Wheel, a ratchet Wheel arranged to be engaged by each pawl, a pinion xedly connected to each ratchet Wheel and meshing With the next adjacent gear Wheel, the top Wall of said casing being provided With apertures concentric with and of less diameter than said number Wheels, perforated annular members carried by the number Wheels and extending through said apertures, a stop member ormed in each of said apertures, and means for preventing the number Wheels from rotating backward.

4. In an adding machine of the character described, the combination of a casing, a plurality of spaced posts carried by the bottom Wall of said casing, a number Wheel loosely mounted upon each post, numbers from 0 to 9 provided upon the upper face of each number wheel, a gear Wheel xedly attached to each number Wheel, a paivl carried by each gear Wheel, a ratchet Wheel arranged to be engaged by each pawl, a pinion lixedly connected with each ratchet Wheel and meshing with the next adjacent gear Wheel, the top wall of the casing provided with apertures concentric with and of less diameter than the number Wheels, numbers from 1 to 9 provided upon the top wall of the casing around said apertures, said top Wall being provided with a small aperture between the l and the 9 and perforated annular members carriedby the number' Wheels and extending through the irst mentioned apertures.

In an adding machine of the character described, the combination of a casing, a plurality oit spaced posts carried by the bottom wall of said casing, a number' Wheel loosely mounted upon each post, numbers from 0 to 9 provided upon the upper 'face of each number Wheel, a gear Wheel fixedly attached to each number Wheel,` a pawl carried by each gear Wheel, a ratchet Wheel arranged to be engaged by each pawl, a pinion ixedly con-k nected With each ratchet Wheel and meshing ,with the next adjacent gear Wheel,the top Wall of the casing provided with apertures concentric with and of less diameter than the number Wheels, numbers from 1 to 9 provided upon the top 'Wall of the casing around said apertures, said top kWall being providedwith a small aperture between the l and the 9 and perforated annular members carried bythe number Wheels and extend ing through the first mentioned apertures, and a stop arranged adjacent each of said small apertures.

6. In an adding machine of the character described, they combination of a casing, a plurality of spaced posts carried by the bottom Wall of the casing, a number Wheel loosely mounted upon each post, a gear Wheel xedly attached to each number Wheel, a paWl slidably mounted upon each gear wheel, a pin carried by each pavvl, an eccentric track iXed'to the casing and arranged to receive said pin to move the pavvl radially upon said gear Wheel, a ratchet Wheel arranged to be engaged by said pavvl, a pinion iixedly connected to each ratchet Wheel and meshing with the next adjacent gear Wheel and means for rotating each. of said number Wheels.

7 In an adding machine of the character described, the combination of a casing, a plurality of spaced posts carried by the bottom wall of said casing, a number Wheel provided upon each post and provided with numbers from 0 to 9, a pin provided upon each number Wheel adjacent the 0, a gear Wheel xedly attached to each number Wheel, a paWl carried by each gear Wheel, a ratchet Wheel arranged to be engaged by each pavvl, a pinion ixedly connected to each ratchet Wheel and meshing With the next adjacent gear wheel and means for yrotating each of said number Wheels and means for engaging the pins upon the number Wheels, to move said number Wheels to the Zero position in order to clear the machine.

8. In an adding machine of the character described, the combination of a casing, a plurality of spaced posts carried by the bottom wall of said casing, a number Wheel provided upon each post and provided with numbers from O to 9, a pin provided upon each number Wheel adjacent the 0, -a gear Wheel ixedly attached to each number Wheel, a paWl carried by each gear Wheel, a

ratchet Wheel arranged to be engaged by each pawl, a pinion fxedly connected to each ratchet Wheel and meshing with the next adjacent gear Wheel and means for rotating each of said number Wheels and a pair of slidable bars provided With fingers arranged to engage the pins upon the number Wheels to move said number Wheels to the zero position in order to clear the machine.

9. In an adding machine 0f the character described, the combination of a casing, a plurality of spaced posts carried by bars 1ocated on the bottom Wall of said casing, a number Wheel provided upon each post and provided with numbers from 0 to 9, a pin provided upon each number Wheel adjacent the 0, a gear Wheel xedly attached to each number Wheel, a pawl carried by each gear Wheel, a ratchet Wheel arranged to be engaged by each pawl, a pinion Xedly connected to each ratchet. Wheel and meshing with the next adjacent gear Wheel and means for rotating each of said number Wheels, means for engaging the pins upon the number Wheels, to move said number Wheels to thezero position in order to clear the machineythe cover of said casing being provided With angulaislots and posts upon said bars slidably located in said slots.

In testimony that I claim the above I have hereuntoy subscribed my name.

' FREDOLF J. PETERSON.

Copies of this patent may be obtained for ve cents each, by vaddressing the Commissioner 4ot Patents. Washington, D. C." 

